Hi, can anyone help tell me about this?
I want to test my raw disk IO performance using 'dd' or other tools like
vdbench. But I don't know which device file should be correct, or both OK. What
about the difference between these two file when I do dd to them?
In my opinion I think when using /dev/rdsk/xxx, read/write requests are
directly sent to device driver. Otherwise when using /dev/dsk/xxx, read/write
requests will be processed first by high level file system interface(such as
vfs) then sent to device driver. So the /dev/rdsk/xxx is more suitable to test
raw disk IO performance. Is this thought correct?
Thanks
Guoqing
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